Objective
Today, we will extend what we learned yesterday about Inheritance to Abstract Classes. Because this is a very specific object oriented concept, submissions are limited to the few languages that use this construct. Check out the Tutorial tab for learning materials and an instructional video.
Task
Given a Book class and a Solution class, write a MyBook class that does the following:
- Inherits from Book
- Has a parameterized constructor taking these parameters:
- string
- string
- int
- Implements the Book class' abstract display() method so it prints these lines:
- , a space, and then the current instance's .
- , a space, and then the current instance's .
- , a space, and then the current instance's .
Note: Because these classes are being written in the same file, you must not use an access modifier (e.g.: ) when declaring MyBook or your code will not execute.
Input Format
You are not responsible for reading any input from stdin. The Solution class creates a Book object and calls the MyBook class constructor (passing it the necessary arguments). It then calls the display method on the Book object.
Output Format
The method should print and label the respective , , and of the MyBook object's instance (with each value on its own line) like so:
Title: $title
Author: $author
Price: $price
Note: The is prepended to variable names to indicate they are placeholders for variables.
Sample Input
The following input from stdin is handled by the locked stub code in your editor:
The Alchemist
Paulo Coelho
248
Sample Output
The following output is printed by your display() method:
Title: The Alchemist
Author: Paulo Coelho
Price: 248